ADR-018: substrate provenance register + cherry-pick procedure (OQ-11 resolved — Phase 1 question set closed)

docs/architecture/README.md

@@ -1,6 +1,6 @@
 ---
 status: draft
-last_updated: 2026-10-06 (ADR-017; OQ-10 resolved)
+last_updated: 2026-10-06 (ADR-018; OQ-11 resolved — question set closed)
 ---
 
 # alkstore — Architecture
@@ -52,17 +52,15 @@ pending architecture review and OQ resolution.
 | [015](decisions/015-streams-depth.md) | Streams depth — carried-metadata keys, global-FIFO ordering row, `StreamEvent` shape, `publish_with_key_tx`, `trim_to` | Accepted |
 | [016](decisions/016-deployment-honesty.md) | Deployment honesty — no runtime capability surface; compile-time engine identity + documented matrix | Accepted |
 | [017](decisions/017-contract-versioning.md) | Contract versioning — core crate's semver is the contract version; change classes, pairing carriers, lockstep duties | Accepted |
+| [018](decisions/018-provenance-register-and-cherry-picks.md) | Substrate provenance register and cherry-pick procedure — `PROVENANCE.md` in-tree, per-delta category-tagged entries, five-step adoption discipline | Accepted |
 
 ## Open Questions
 
 Tracked in [open-questions.md](open-questions.md) (OQ-01..NN; the
 Phase 0 register's OQ-ST-01..08 promote one-to-one — OQ-NN mirrors
-OQ-ST-NN — with new Phase 1 questions appended after). Open, in
-suggested resolution order:
-
-- **OQ-11** (medium): forked-substrate follow-through (provenance
-  register format, cherry-pick procedure; item (1) dissolved by
-  [ADR-013](decisions/013-fold-substrate-into-sqlite.md)).
+OQ-ST-NN — with new Phase 1 questions appended after). **The open
+question set is empty** — all thirteen OQs are resolved (2026-10-04
+through 2026-10-06, ADR-001 through ADR-018).
 
 Resolved (kept with resolutions): OQ-01 (feature scope), OQ-02
 (crate split), OQ-03 (drivers), OQ-07 (extension surface cut),
@@ -79,10 +77,12 @@ scheduler guarantee row pinned), ~~OQ-05~~ (queue semantics depth —
 [ADR-014](decisions/014-outbox-tx-enqueue.md)), ~~OQ-12~~ (streams
 depth — [ADR-015](decisions/015-streams-depth.md)), ~~OQ-10~~
 (contract versioning —
-[ADR-017](decisions/017-contract-versioning.md)).
+[ADR-017](decisions/017-contract-versioning.md)), ~~OQ-11~~
+(fork follow-through — provenance register + cherry-pick procedure,
+[ADR-018](decisions/018-provenance-register-and-cherry-picks.md)).
 
-No deferred OQs: all open questions are actionable Phase 1 work with
-complete evidence bases.
+No deferred OQs. With the question set closed, Phase 1 moves to
+architecture review closure and the implementation-phase gates.
 
 ## Document Lifecycle